Пример #1
0
void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) {
  // There are not old-to-young pointers if the old gen is empty.
  assert(!_gen->object_space()->is_empty(),
    "Should not be called is there is no work");
  assert(_gen != NULL, "Sanity");
  assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity");
  assert(_stripe_number < ParallelGCThreads, "Sanity");

  {
    PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);

    assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
    CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set();
    // FIX ME! Assert that card_table is the type we believe it to be.

    card_table->scavenge_contents_parallel(_gen->start_array(),
                                           _gen->object_space(),
                                           _gen_top,
                                           pm,
                                           _stripe_number,
                                           _stripe_total);

    // Do the real work
    pm->drain_stacks(false);
  }
}
Пример #2
0
void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) {
  assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc");

  PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
  PSScavengeRootsClosure roots_closure(pm);
  CLDClosure* roots_from_clds = NULL;  // Not needed. All CLDs are already visited.
  MarkingCodeBlobClosure roots_in_blobs(&roots_closure, CodeBlobToOopClosure::FixRelocations);

  if (_java_thread != NULL)
    _java_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs);

  if (_vm_thread != NULL)
    _vm_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs);

  // Do the real work
  pm->drain_stacks(false);
}
Пример #3
0
void StealTask::do_it(GCTaskManager* manager, uint which) {
  assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc");

  PSPromotionManager* pm =
    PSPromotionManager::gc_thread_promotion_manager(which);
  pm->drain_stacks(true);
  guarantee(pm->stacks_empty(),
            "stacks should be empty at this point");

  int random_seed = 17;
  while(true) {
    StarTask p;
    if (PSPromotionManager::steal_depth(which, &random_seed, p)) {
      TASKQUEUE_STATS_ONLY(pm->record_steal(p));
      pm->process_popped_location_depth(p);
      pm->drain_stacks_depth(true);
    } else {
      if (terminator()->offer_termination()) {
        break;
      }
    }
  }
  guarantee(pm->stacks_empty(), "stacks should be empty at this point");
}
 void do_void() {
   assert(_promotion_manager != NULL, "Sanity");
   _promotion_manager->drain_stacks(true);
   guarantee(_promotion_manager->stacks_empty(),
             "stacks should be empty at this point");
 }
Пример #5
0
void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) {
  assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc");

  PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
  PSScavengeRootsClosure roots_closure(pm);
  PSPromoteRootsClosure  roots_to_old_closure(pm);

  switch (_root_type) {
    case universe:
      Universe::oops_do(&roots_closure);
      break;

    case jni_handles:
      JNIHandles::oops_do(&roots_closure);
      break;

    case threads:
    {
      ResourceMark rm;
      CLDClosure* cld_closure = NULL; // Not needed. All CLDs are already visited.
      Threads::oops_do(&roots_closure, cld_closure, NULL);
    }
    break;

    case object_synchronizer:
      ObjectSynchronizer::oops_do(&roots_closure);
      break;

    case flat_profiler:
      FlatProfiler::oops_do(&roots_closure);
      break;

    case system_dictionary:
      SystemDictionary::oops_do(&roots_closure);
      break;

    case class_loader_data:
    {
      PSScavengeKlassClosure klass_closure(pm);
      ClassLoaderDataGraph::oops_do(&roots_closure, &klass_closure, false);
    }
    break;

    case management:
      Management::oops_do(&roots_closure);
      break;

    case jvmti:
      JvmtiExport::oops_do(&roots_closure);
      break;


    case code_cache:
      {
        MarkingCodeBlobClosure each_scavengable_code_blob(&roots_to_old_closure, CodeBlobToOopClosure::FixRelocations);
        CodeCache::scavenge_root_nmethods_do(&each_scavengable_code_blob);
      }
      break;

    default:
      fatal("Unknown root type");
  }

  // Do the real work
  pm->drain_stacks(false);
}
Пример #6
0
 void do_void() {
   assert(_promotion_manager != NULL, "Sanity");
   _promotion_manager->drain_stacks();
 }